Tornado record · Original Fujita scale
F4 tornado, Delaware County, Iowa, August 12, 1974
RatingF4
Deaths0
Injuries12
Length5 mi
Width400 yd
Path
Drawn as a straight line from the recorded start point (42.35, -91.48) to the end point (42.35, -91.48), which is all NOAA's record holds. The real track may have curved.
The record
- Date
- August 12, 1974, 4:20 PM (as recorded, Central Standard Time)
- Rating
- F4
- States
- Iowa
- Counties
- Delaware County
- Path
- 5 miles long, up to 400 yards wide
- Casualties
- 0 deaths, 12 injuries
Other tornadoes on August 12, 1974
| Date | Rating | State | Path length | Width | Deaths | Injuries |
|---|---|---|---|---|---|---|
| Aug 12, 1974 | F4 | Iowa | 2 mi | 100 yd | 0 | 2 |
| Aug 12, 1974 | F0 | Illinois | 0.1 mi | 10 yd | 0 | 0 |
Tornado history nearby
Source: NOAA Storm Prediction Center severe weather database, 1950 to 2025.